Elements and Compounds

Front

What is an element?

Back

An element is a pure substance that consists of only one kind of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements bond together.

Front

Is Iron (Fe) an element or a compound?

Back

Iron (Fe) is an element.

Front

Which of the following is NOT an example of an element: Helium gas, Hydrogen, Ice, Iron?

Back

Ice is NOT an example of an element.

Front

How many elements are in H2O?

Back

There are 2 elements in H2O: Hydrogen and Oxygen.

Front

Can compounds be separated by physical means?

Back

No, compounds cannot be separated by physical means; they require chemical reactions to break down.

Front

What is the smallest unit of an element?

Back

The smallest unit of an element is an atom.

Front

What is the difference between an element and a compound?

Back

An element consists of one type of atom, while a compound consists of two or more different types of atoms bonded together.

Front

Give an example of a compound.

Back

Water (H2O) is an example of a compound.

Front

What are the properties of elements?

Back

Elements have unique properties that are different from the properties of the compounds they form.